A set top box enables you to watch digital TV broadcasts on an analog TV. If you want to keep your existing analog TV, you’ll need a set top box to be able to see digital free-to-air TV after the switchover. Set top boxes range from basic Standard Definition (SD) models to High Definition (HD) models and may include electronic program guides and interactive features such as pausing and replaying live TV. Ipswich Antenna & Communication Services supply both of these products and install them for you.